public void CheckIn(SockIO socket, bool addToAvail)
{
if (socket == null)
{
return;
}
string host = socket.Host;
//if(Log.IsDebugEnabled)
//{
// Log.Debug("Calling check-in on socket: " + socket.ToString() + " for host: " + host);
//}
// remove from the busy pool
//if(Log.IsDebugEnabled)
//{
// Log.Debug("Removing socket (" + socket.ToString() + ") from busy pool for host: " + host);
//}
RemoveSocketFromPool(_busyPool, host, socket);
// add to avail pool
if (addToAvail && socket.IsConnected)
{
//if(Log.IsDebugEnabled)
//{
// Log.Debug("Returning socket (" + socket.ToString() + " to avail pool for host: " + host);
//}
AddSocketToPool(_availPool, host, socket);
}
}
/// <summary>
/// 根据缓存Key获取其所存储的服务器信息
/// </summary>
/// <param name="key">缓存Key</param>
/// <returns>Key所存储的服务器信息</returns>
public static string GetHostInfoByCacheKey(string key)
{
string hostInfo = "";
SockIO sock = null;
try
{
sock = SockIOPool.GetInstance(SocketPoolName).GetSock(key);
if (sock != null)
{
hostInfo = sock.Host;
}
}
finally
{
if (sock != null)
{
sock.Close();
}
}
return(hostInfo);
}
protected static void RemoveSocketFromPool(Hashtable pool, string host, SockIO socket)
{
if (host != null && host.Length == 0 || pool == null)
{
return;
}
if (pool.ContainsKey(host))
{
Hashtable sockets = (Hashtable)pool[host];
if (sockets != null)
{
sockets.Remove(socket);
}
}
}
/// <summary>
/// Adds a socket to a given pool for the given host.
///
/// Internal utility method.
/// </summary>
/// <param name="pool">pool to add to</param>
/// <param name="host">host this socket is connected to</param>
/// <param name="socket">socket to add</param>
//[MethodImpl(MethodImplOptions.Synchronized)]
protected static void AddSocketToPool(Hashtable pool, string host, SockIO socket)
{
if (pool == null)
{
return;
}
Hashtable sockets;
if (host != null && host.Length != 0 && pool.ContainsKey(host))
{
sockets = (Hashtable)pool[host];
if (sockets != null)
{
sockets[socket] = DateTime.Now; //MaxM 1.16.05: Use current DateTime to indicate socker creation time rather than milliseconds since 1970
return;
}
}
sockets = new Hashtable();
sockets[socket] = DateTime.Now; //MaxM 1.16.05: Use current DateTime to indicate socker creation time rather than milliseconds since 1970
pool[host] = sockets;
}
public SockIO GetConnection(string host)
{
if (!_initialized)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("get socket from uninitialized pool"));
//}
return(null);
}
if (host == null)
{
return(null);
}
// if we have items in the pool
// then we can return it
if (_availPool != null && !(_availPool.Count == 0))
{
// take first connected socket
Hashtable aSockets = (Hashtable)_availPool[host];
if (aSockets != null && !(aSockets.Count == 0))
{
foreach (SockIO socket in new IteratorIsolateCollection(aSockets.Keys))
{
if (socket.IsConnected)
{
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("move socket").Replace("$$Host$$", host).Replace("$$Socket$$", socket.ToString()));
//}
// remove from avail pool
aSockets.Remove(socket);
// add to busy pool
AddSocketToPool(_busyPool, host, socket);
// return socket
return(socket);
}
else
{
// not connected, so we need to remove it
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("socket not connected").Replace("$$Host$$", host).Replace("$$Socket$$", socket.ToString()));
//}
// remove from avail pool
aSockets.Remove(socket);
}
}
}
}
// if here, then we found no sockets in the pool
// try to create on a sliding scale up to maxCreate
object cShift = _createShift[host];
int shift = (cShift != null) ? (int)cShift : 0;
int create = 1 << shift;
if (create >= _maxCreate)
{
create = _maxCreate;
}
else
{
shift++;
}
// store the shift value for this host
_createShift[host] = shift;
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("creating sockets").Replace("$$Create$$", create.ToString(new NumberFormatInfo())));
//}
for (int i = create; i > 0; i--)
{
SockIO socket = CreateSocket(host);
if (socket == null)
{
break;
}
if (i == 1)
{
// last iteration, add to busy pool and return sockio
AddSocketToPool(_busyPool, host, socket);
return(socket);
}
else
{
// add to avail pool
AddSocketToPool(_availPool, host, socket);
}
}
// should never get here
return(null);
}
/// <summary>
/// Returns appropriate SockIO object given
/// string cache key and optional hashcode.
///
/// Trys to get SockIO from pool. Fails over
/// to additional pools in event of server failure.
/// </summary>
/// <param name="key">hashcode for cache key</param>
/// <param name="hashCode">if not null, then the int hashcode to use</param>
/// <returns>SockIO obj connected to server</returns>
public SockIO GetSock(string key, object hashCode)
{
string hashCodeString = "<null>";
if (hashCode != null)
{
hashCodeString = hashCode.ToString();
}
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("cache socket pick").Replace("$$Key$$", key).Replace("$$HashCode$$", hashCodeString));
//}
if (key == null || key.Length == 0)
{
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("null key"));
//}
return(null);
}
if (!_initialized)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("get socket from uninitialized pool"));
//}
return(null);
}
// if no servers return null
if (_buckets.Count == 0)
{
return(null);
}
// if only one server, return it
if (_buckets.Count == 1)
{
return(GetConnection((string)_buckets[0]));
}
int tries = 0;
// generate hashcode
int hv;
if (hashCode != null)
{
hv = (int)hashCode;
}
else
{
// NATIVE_HASH = 0
// OLD_COMPAT_HASH = 1
// NEW_COMPAT_HASH = 2
switch (_hashingAlgorithm)
{
case HashingAlgorithm.Native:
hv = key.GetHashCode();
break;
case HashingAlgorithm.OldCompatibleHash:
hv = OriginalHashingAlgorithm(key);
break;
case HashingAlgorithm.NewCompatibleHash:
hv = NewHashingAlgorithm(key);
break;
default:
// use the native hash as a default
hv = key.GetHashCode();
_hashingAlgorithm = HashingAlgorithm.Native;
break;
}
}
// keep trying different servers until we find one
while (tries++ <= _buckets.Count)
{
// get bucket using hashcode
// get one from factory
int bucket = hv % _buckets.Count;
if (bucket < 0)
{
bucket += _buckets.Count;
}
SockIO sock = GetConnection((string)_buckets[bucket]);
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("cache choose").Replace("$$Bucket$$", _buckets[bucket].ToString()).Replace("$$Key$$", key));
//}
if (sock != null)
{
return(sock);
}
// if we do not want to failover, then bail here
if (!_failover)
{
return(null);
}
// if we failed to get a socket from this server
// then we try again by adding an incrementer to the
// current key and then rehashing
switch (_hashingAlgorithm)
{
case HashingAlgorithm.Native:
hv += ((string)("" + tries + key)).GetHashCode();
break;
case HashingAlgorithm.OldCompatibleHash:
hv += OriginalHashingAlgorithm("" + tries + key);
break;
case HashingAlgorithm.NewCompatibleHash:
hv += NewHashingAlgorithm("" + tries + key);
break;
default:
// use the native hash as a default
hv += ((string)("" + tries + key)).GetHashCode();
_hashingAlgorithm = HashingAlgorithm.Native;
break;
}
}
return(null);
}
/// <summary>
/// Creates a new SockIO obj for the given server.
///
///If server fails to connect, then return null and do not try
///again until a duration has passed. This duration will grow
///by doubling after each failed attempt to connect.
/// </summary>
/// <param name="host">host:port to connect to</param>
/// <returns>SockIO obj or null if failed to create</returns>
protected SockIO CreateSocket(string host)
{
SockIO socket = null;
// if host is dead, then we don't need to try again
// until the dead status has expired
// we do not try to put back in if failover is off
if (_failover && _hostDead.ContainsKey(host) && _hostDeadDuration.ContainsKey(host))
{
DateTime store = (DateTime)_hostDead[host];
long expire = ((long)_hostDeadDuration[host]);
if ((store.AddMilliseconds(expire)) > DateTime.Now)
{
return(null);
}
}
try
{
socket = new SockIO(this, host, _socketTimeout, _socketConnectTimeout, _nagle);
if (!socket.IsConnected)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("failed to get socket").Replace("$$Host$$", host));
//}
try
{
socket.TrueClose();
}
catch //(SocketException ex)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("failed to close socket on host").Replace("$$Host$$", host), ex);
//}
socket = null;
}
}
}
catch //(SocketException ex)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("failed to get socket").Replace("$$Host$$", host), ex);
//}
socket = null;
}
//catch(ArgumentException ex)
//{
// if(Log.IsErrorEnabled)
// {
// Log.Error(GetLocalizedString("failed to get socket").Replace("$$Host$$", host), ex);
// }
// socket = null;
//}
//catch(IOException ex)
//{
// if(Log.IsErrorEnabled)
// {
// Log.Error(GetLocalizedString("failed to get socket").Replace("$$Host$$", host), ex);
// }
// socket = null;
//}
// if we failed to get socket, then mark
// host dead for a duration which falls off
if (socket == null)
{
DateTime now = DateTime.Now;
_hostDead[host] = now;
long expire = (_hostDeadDuration.ContainsKey(host)) ? (((long)_hostDeadDuration[host]) * 2) : 100;
_hostDeadDuration[host] = expire;
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("ignoring dead host").Replace("$$Host$$", host).Replace("$$Expire$$", expire.ToString(new NumberFormatInfo())));
//}
// also clear all entries for this host from availPool
ClearHostFromPool(_availPool, host);
}
else
{
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("created socket").Replace("$$ToString$$", socket.ToString()).Replace("$$Host$$", host));
//}
_hostDead.Remove(host);
_hostDeadDuration.Remove(host);
if (_buckets.BinarySearch(host) < 0)
{
_buckets.Add(host);
}
}
return(socket);
}
public void Initialize()
{
// check to see if already initialized
if (_initialized &&
_buckets != null &&
_availPool != null &&
_busyPool != null)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("initializing initialized pool"));
//}
return;
}
// initialize empty maps
_buckets = new ArrayList();
_availPool = new Hashtable(_servers.Count * _initConns);
_busyPool = new Hashtable(_servers.Count * _initConns);
_hostDeadDuration = new Hashtable();
_hostDead = new Hashtable();
_createShift = new Hashtable();
_maxCreate = (_poolMultiplier > _minConns) ? _minConns : _minConns / _poolMultiplier; // only create up to maxCreate connections at once
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("initializing pool")
// .Replace("$$InitConnections$$", InitConnections.ToString(new NumberFormatInfo()))
// .Replace("$$MinConnections$$", MinConnections.ToString(new NumberFormatInfo()))
// .Replace("$$MaxConnections$$", MaxConnections.ToString(new NumberFormatInfo())));
//}
// if servers is not set, or it empty, then
// throw a runtime exception
if (_servers == null || _servers.Count <= 0)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("initialize with no servers"));
//}
throw new ArgumentException(GetLocalizedString("initialize with no servers"));
}
for (int i = 0; i < _servers.Count; i++)
{
// add to bucket
// with weights if we have them
if (_weights != null && _weights.Count > i)
{
for (int k = 0; k < ((int)_weights[i]); k++)
{
_buckets.Add(_servers[i]);
//if(Log.IsDebugEnabled)
//{
// Log.Debug("Added " + _servers[i] + " to server bucket");
//}
}
}
else
{
_buckets.Add(_servers[i]);
//if(Log.IsDebugEnabled)
//{
// Log.Debug("Added " + _servers[i] + " to server bucket");
//}
}
// create initial connections
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("create initial connections").Replace("$$InitConns$$", InitConnections.ToString(new NumberFormatInfo())).Replace("$$Servers[i]$$", Servers[i].ToString()));
//}
for (int j = 0; j < _initConns; j++)
{
SockIO socket = CreateSocket((string)_servers[i]);
if (socket == null)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("failed to connect").Replace("$$Servers[i]$$", Servers[i].ToString()).Replace("$$j$$", j.ToString(new NumberFormatInfo())));
//}
break;
}
AddSocketToPool(_availPool, (string)_servers[i], socket);
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("created and added socket").Replace("$$ToString$$", socket.ToString()).Replace("$$Servers[i]$$", Servers[i].ToString()));
//}
}
}
// mark pool as initialized
_initialized = true;
// start maint thread TODO: re-enable
if (_maintThreadSleep > 0)
{
this.StartMaintenanceThread();
}
}
protected void SelfMaintain()
{
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("start self maintenance"));
//}
// go through avail sockets and create/destroy sockets
// as needed to maintain pool settings
foreach (string host in new IteratorIsolateCollection(_availPool.Keys))
{
Hashtable sockets = (Hashtable)_availPool[host];
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("size of available pool").Replace("$$Host$$", host).Replace("$$Sockets$$", sockets.Count.ToString(new NumberFormatInfo())));
//}
// if pool is too small (n < minSpare)
if (sockets.Count < _minConns)
{
// need to create new sockets
int need = _minConns - sockets.Count;
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("need to create new sockets").Replace("$$Need$$", need.ToString(new NumberFormatInfo())).Replace("$$Host$$", host));
//}
for (int j = 0; j < need; j++)
{
SockIO socket = CreateSocket(host);
if (socket == null)
{
break;
}
AddSocketToPool(_availPool, host, socket);
}
}
else if (sockets.Count > _maxConns)
{
// need to close down some sockets
int diff = sockets.Count - _maxConns;
int needToClose = (diff <= _poolMultiplier)
? diff
: (diff) / _poolMultiplier;
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("need to remove spare sockets").Replace("$$NeedToClose$$", needToClose.ToString(new NumberFormatInfo()).Replace("$$Host$$", host)));
//}
foreach (SockIO socket in new IteratorIsolateCollection(sockets.Keys))
{
if (needToClose <= 0)
{
break;
}
// remove stale entries
DateTime expire = (DateTime)sockets[socket];
// if past idle time
// then close socket
// and remove from pool
if ((expire.AddMilliseconds(_maxIdle)) < DateTime.Now)
{
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("removing stale entry"));
//}
try
{
socket.TrueClose();
}
catch//(IOException ioe)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("failed to close socket"), ioe);
//}
}
sockets.Remove(socket);
needToClose--;
}
}
}
// reset the shift value for creating new SockIO objects
_createShift[host] = 0;
}
// go through busy sockets and destroy sockets
// as needed to maintain pool settings
foreach (string host in _busyPool.Keys)
{
Hashtable sockets = (Hashtable)_busyPool[host];
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("size of busy pool").Replace("$$Host$$", host).Replace("$$Sockets$$", sockets.Count.ToString(new NumberFormatInfo())));
//}
// loop through all connections and check to see if we have any hung connections
foreach (SockIO socket in new IteratorIsolateCollection(sockets.Keys))
{
// remove stale entries
DateTime hungTime = (DateTime)sockets[socket];
// if past max busy time
// then close socket
// and remove from pool
if ((hungTime.AddMilliseconds(_maxBusyTime)) < DateTime.Now)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("removing hung connection").Replace("$$Time$$", (new TimeSpan(DateTime.Now.Ticks - hungTime.Ticks).TotalMilliseconds).ToString(new NumberFormatInfo())));
//}
try
{
socket.TrueClose();
}
catch//(IOException ioe)
{
//if(Log.IsErrorEnabled)
//{
// Log.Error(GetLocalizedString("failed to close socket"), ioe);
//}
}
sockets.Remove(socket);
}
}
}
//if(Log.IsDebugEnabled)
//{
// Log.Debug(GetLocalizedString("end self maintenance"));
//}
}
public void CheckIn(SockIO socket)
{
CheckIn(socket, true);
}
